模拟AndroidPN Client(2)——XmppManager简析和模拟客户端

前面说过XmppManager(位于AndroidPn Client的org.androidpn.client包内)是主控制器，通过调用其他的提供的某些方法，来实现客户端的连接(Connect)、注册(Register)和登陆(Login)。在模拟AndroidPn Client，实际上就是将该类以及该类所用的对象移植到PC端去。

1.首先先看XmppManager的实例变量(这里只列出我们在模拟Client时，用到的实例变量)

   1: //用来提交线程任务(ConnnectTask,RegisterTask,LoginTask)

   2: private NotificationService.TaskSubmitter taskSubmitter;

   3:  

   4: //服务器的主机名

   5: private String xmppHost;

   6: //服务器的端口号

   7: private int xmppPort;

   8:  

   9: //客户端与服务器的连接

  10: private XMPPConnection connection;

  11:  

  12: //客户端的用户名

  13: private String username;

  14: //密码

  15: private String password;

  16:  

  17: //Xmpp节的监听器,当客户端接受xmpp节时,会调用PacketListener的方法处理收到的xmpp节

  18: private PacketListener notificationPacketListener;

  19:  

  20: //任务列表

  21: private List<Runnable> taskList;

  22:  

  23: //当前是否有任务正在执行

  24: private boolean running = false;

  25:  

  26: //任务返回结果

  27: private Future<?> futureTask;

其中NotificationService.TaskSubmitter的实现代码如下

   1: public class TaskSubmitter {

   2:  

   3:         final NotificationService notificationService;

   4:  

   5:         public TaskSubmitter(NotificationService notificationService) {

   6:             this.notificationService = notificationService;

   7:         }

   8:  

   9:         @SuppressWarnings("unchecked")

  10:         public Future submit(Runnable task) {

  11:             Future result = null;

  12:             if (!notificationService.getExecutorService().isTerminated()

  13:                     && !notificationService.getExecutorService().isShutdown()

  14:                     && task != null) {

  15:                 result = notificationService.getExecutorService().submit(task);

  16:             }

  17:             return result;

  18:         }

  19:  

  20:     }

12行notificationService.getExecutorService()返回一个 ExecutorService 对象，这是Java标准类。在模拟段，用该类替换NotificationService.TaskSubmitter

 

模拟端的实例变量如下

   1: private String xmppHost = "192.168.1.109";//服务器的实际IP

   2: private int xmppPort = 5222;//服务器的实际端口

   3: private List<Runnable> taskList;

   4: private boolean running = false;

   5: private String username;

   6: private String password;

   7: private XMPPConnection connection;

   8: private NotificationPacketListener notificationPacketListener;

2.模拟AndroidPN Client,只是模拟其最基本的功能，即模拟端和服务器连接之后，可以收到服务器推送的信息，再将消息打印出来(也可以对消息进行其他处理)，因此像重连，下线之类的功能，暂不考虑。

 

AndroidPN Client通过连接(Connect),注册(Register),登陆(Login)三步，建立起和服务器之间的Session。服务器就是通过该Session向客户端推送信息。这三步正好对应XmppManager中的三个线程类ConnectTask,RegisterTask和LoginTask。

ConnectTask

   1: private class ConnectTask implements Runnable {

   2:     @Override

   3:     public void run() {

   4:         ConnectionConfiguration connConfig = new ConnectionConfiguration(xmppHost, xmppPort);

   5:         connConfig.setSecurityMode(SecurityMode.required);

   6:         connConfig.setSASLAuthenticationEnabled(false);

   7:         connConfig.setCompressionEnabled(false);

   8:         connection = new XMPPConnection(connConfig);

   9:         try {

  10:             connection.connect();

  11:             //这行代码,确保客户端能收到服务器推送来的消息！！！

  12:             ProviderManager.getInstance().addIQProvider("notification",

  13:                     "androidpn:iq:notification",

  14:                     new NotificationIQProvider());

  15:         } catch (XMPPException e) {

  16:             // TODO Auto-generated catch block

  17:             e.printStackTrace();

  18:         }

  19:         // 调用任务队列的下个方法

  20:         runTask();

  21:  

  22:     }

  23:  

  24: }

12~14: ProviderManager.getInstance().addIQProvider("notification","androidpn:iq:notification",new NotificationIQProvider());保证客户端能收到服务器推送的信息

RegisterTask

   1: private class RegisterTask implements Runnable {

   2:  

   3:     @Override

   4:     public void run() {

   5:         Registration registration = new Registration();

   6:         PacketFilter packetFilter = new AndFilter(new PacketIDFilter(

   7:                 registration.getPacketID()), new PacketTypeFilter(IQ.class));

   8:         PacketListener packetListener = new PacketListener() {

   9:  

  10:             @Override

  11:             public void processPacket(Packet packet) {

  12:                 if (packet instanceof IQ) {

  13:                     IQ response = (IQ) packet;

  14:                     // 如果出错

  15:                     if (response.getType() == IQ.Type.ERROR) {

  16:                         if (response.getError().toString().contains("409")) {

  17:                               System.out.println("注册XMPP账号时发生未知错误"

  18:                                       + response.getError().getCondition());

  19:                         }

  20:                         // 如果没出错 执行任务队列的下个任务

  21:                     } else if (response.getType() == IQ.Type.RESULT) {

  22:                           System.out.println("用户名：" + username);

  23:                           System.out.println("密码：" + password);

  24: //

  25:                           System.out.println("注册成功");

  26:                         runTask();

  27:                     }

  28:                 }

  29:             }

  30:         };

  31:  

  32:         connection.addPacketListener(packetListener, packetFilter);

  33:         registration.setType(IQ.Type.SET);

  34:         Map<String, String> attributes = new HashMap<String, String>();

  35:         //attributes.put("username", username);

  36:         //attributes.put("password", password);

  37:         //registration.setAttributes(attributes);

  38:         registration.addAttribute("username", username);

  39:         registration.addAttribute("password", password);

  40:  

  41:         connection.sendPacket(registration);

  42:     }

模拟端的RegisterTask和XmppManager的RegisterTask，只要去掉与Android SDK相关的代码即可。

LoginTask

   1: private class LoginTask implements Runnable{

   2:  

   3:     @Override

   4:     public void run() {

   5:     try {

   6:             //客户端登陆,当登陆成功后,服务器端就有一个Session

   7:             connection.login(username, password, "AndroidClient");

   8:             //Xmpp节过滤器,客户端只接受NotificationIQ的xmpp节

   9:             PacketFilter packetFilter = new PacketTypeFilter(NotificationIQ.class);

  10:             connection.addPacketListener(notificationPacketListener, packetFilter);

  11:         } catch (XMPPException e) {

  12:             // TODO Auto-generated catch block

  13:             e.printStackTrace();

  14:         }

  15:     }

  16:     

  17: }

 

3.其余的执行代码和AndroidPN Client的代码基本一致，不再赘述。